如何将上下文传递给迁移？

Question

我想序列化一个表中的数据并将其作为迁移的一部分放入另一个表中。 问题是我正在使用服务器上不存在的本地机密创建上下文。 如何将上下文转发给迁移，以免在迁移中创建上下文。

private static IConfigurationRoot Configuration { get; set; }

    protected override void Up(MigrationBuilder migrationBuilder)
    {
        //initialization
        var orgStructureAppNodes = new List<BaseApplicationNode>();
        var documentFlowAppNodes = new List<BaseApplicationNode>();
        var jsonSettings = new JsonSerializerSettings
        {
            TypeNameHandling = TypeNameHandling.All,
            PreserveReferencesHandling = PreserveReferencesHandling.Objects
        };
        //create context
        var builder = new ConfigurationBuilder();
        builder.AddUserSecrets<TbpmApplicationMigrateToNewNavigator>();
        Configuration = builder.Build();
        var options = new DbContextOptionsBuilder<ApplicationPostgreSqlContext>()
            .UseNpgsql(migrationBuilder.ActiveProvider)
            .Options;
        var context = new ApplicationPostgreSqlContext(options);
        context.Database.OpenConnection();
        using (var command = context.Database.GetDbConnection().CreateCommand())
        {
            command.CommandText =
                "SELECT \"Id\", \"Title\", \"Icon\", \"Type\", \"TargetId\", \"SectionId\" FROM \"navigator\".\"Nodes\"";
            using (var reader = command.ExecuteReader())
            {
                while (reader.Read())
                {
                    Guid entityId = Guid.Empty;
                    if (Guid.TryParse(reader.GetValue(4).ToString(), out var id))
                        entityId = id;

                    var app = new ApplicationEntityNode
                    {
                        Id = Guid.Parse(reader.GetValue(0).ToString()),
                        Title = reader.GetValue(1).ToString(),
                        Icon = reader.GetValue(2).ToString(),
                        Type = (ApplicationNodeType)int.Parse(reader.GetValue(3).ToString()),
                        EntityId = entityId
                    };
                    if (reader.GetValue(5).ToString() ==
                        "d6a9b28b-4dbe-4ef8-bb74-53e999723b04") //orgStructure sectionId
                        orgStructureAppNodes.Add(app);
                    else documentFlowAppNodes.Add(app);
                }
            }
        }
        //serialization and insert data
    }